DePlo is a program that converts the dependency relationship between Ada packages (i.e., who "with"s whom) into a graph description in DOT format. Such a description can be successively converted to a graphical representation (PDF, PostScript, jpg, SVG, XFig, ...) by using, for example, one of the software available in the Graphviz page (home of the DOT language). Package hierarchy is showed by drawing child packages inside their parents. The graph can be simplified by "collapsing" whole package hierarchies in a single node.
Currently it works only in a GNAT environment since it get the dependency graph by reading the ALI files generated by GNAT. I guess that it would be possible to make it portable by using ASIS... maybe in a future release.
Very short answer: why not? :-)
Short answer: an itch of mine
Long and more meaningfull answer:
I had the need of visualizing the mutual dependencies among the packages in a large piece of software that I am developing (currently 185 packages, for almost 1 Mbyte of source code). With such a large number of files, the dependency tool provided by GPS produced just a mess. Moreover, I wanted to print it, in order to attach it to the wall. Therefore, I wrote this program.
I work with Linux and I tested the code only there, but the program is in Ada (actually Ada 2005), so you should not experience any portability issue, as long as you have an Ada 2005 compiler.
An Ada 2005 compiler, but since the current release works only with GNAT compiler, if you download this you already have a GNAT compiler and this requirement is satisfied.
DePlo is released under the terms of the LGPL v3. For more information, see the official site.